Brain-Reading Headset to Sell for $299 has release plans for Emotiv Systems'
headset controller that allows the user's thoughts to control games (thank
Stadius). The EPOC neuroheadset will be available later this year at that $299
price point. This unit had some trouble at its GDC demonstration
(story), though this seems related to interference from
non-consumer products in the area. Word is:

The company, which unveiled a
prototype last year, says the headset can detect emotions such as anger,
excitement and tension, as well as facial expressions and cognitive actions like
pushing and pulling objects.

The headset will be sold with a game developed by Emotiv, but it can also be
made to work with existing PC games, the company said. Users will also be able
to access an online portal to play more games, chat or upload their own content
such as music or photos.

Emotiv plans to work with IBM Corp. to explore applications beyond video gaming.
The "brain computer interface" technology could transform not only gaming, but
how humans and computers interact, said Paul Ledak, vice president of IBM's
Digital Convergence business.

I think we'd be wise to harken back to the days of crappy infared peripherals like the U-Force. I think I'll wait a couple of revisions before going near anything like this.

If anything, I think it'd be most useful in conjunction with a real input device, so that when I have those "oh shit" moments while reloading, I don't have to fumble around for the "knife that guy" key.